By the "M" on his pajamas.
Warm milk before bed... Get your mind out of the gutter!
Piece of cake
Don't worry they'll tell you themselves.
By the buckle print on her forehead.
They couldn't figure out Who was on first (Sorry, if this has been submitted before, im new here)
Sorry mates Im out of babes (its a linguistic joke)
M'laria
Nothing, you can't cross a scaler with a vector.
He has a big E on his pajamas.